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Question 7 1 pts A 0.28 kg block on a horizontal frictionless surface is attached to an ideal massless spring whose spring constant is 500

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Question 7 1 pts A 0.28 kg block on a horizontal frictionless surface is attached to an ideal massless spring whose spring constant is 500 N/m. The block is pulled from its equilibrium position at x = 0.00 m to a displacement x = +0.080 m and is released from rest. The block then executes simple harmonic motion along the horizontal x-axis. When the displacement is x = -0.052 m, the acceleration of the block is: O 46 m/s2 0 92 m/s2 0 69 m/s2 0 230 m/s2 Question 8 1 pts For a standing wave the wavelength must equal: 0 the distance between adjacent nodes. 0 twice the distance between adjacent nodes. 0 the distance between supports. 0 the distance between adjacent antinodes. Question 9 1 pts Two strings, one thick and the other thin, are connected to form one long string. As a wave travels along the string and passes the point where the two strings are connected, all of the following change except for: O the speed of the wave 0 the frequency of the wave 0 amplitude of the wave O the wavelength of the wave Question 10 1 pts Two water waves meet at the same point, one having a displacement above equilibrium of 60 cm and the other having a displacement above equilibrium of 80 cm. At this moment, what is the resulting displacement above equilibrium? O 140 cm O 70 cm O 20 cm O Information about the amplitudes needs to be given to find an

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